Daniels, Luke M., Kashtiban, Reza J., Kepaptsoglou, Demie, Ramasse, Quentin M., Sloan, Jeremy and Walton, Richard I. (2016) Local A-site layering in rare-earth orthochromite Perovskites by solution synthesis. Chemistry - A European Journal, 22 (51). pp. 18362-18367. doi:10.1002/chem.201604766 ISSN 0947-6539.

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Abstract

Cation size effects were examined in the mixed A-site perovskites La0.5Sm0.5CrO3 and La0.5Tb0.5CrO3 prepared through both hydrothermal and solid-state methods. Atomically resolved electron energy loss spectroscopy (EELS) in the transmission electron microscope shows that while the La and Sm cations are randomly distributed, increased cation-radius variance in La0.5Tb0.5CrO3 results in regions of localised La and Tb layers, an atomic arrangement exclusive to the hydrothermally prepared material. Solid-state preparation gives lower homogeneity resulting in separate nanoscale regions rich in La3+ and Tb3+. The A-site layering in hydrothermal La0.5Tb0.5CrO3 is randomised upon annealing at high temperature, resulting in magnetic behaviour that is dependent on synthesis route.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry Q Science > QE Geology
Divisions:	Faculty of Science, Engineering and Medicine > Science > Chemistry
Library of Congress Subject Headings (LCSH):	Chromite, Perovskite, Magnetism, Electron energy loss spectroscopy
Journal or Publication Title:	Chemistry - A European Journal
Publisher:	Wiley - V C H
ISSN:	0947-6539
Official Date:	12 December 2016
Dates:	Date Event 12 December 2016 Published 3 November 2016 Available 11 October 2016 Accepted
Volume:	22
Number:	51
Page Range:	pp. 18362-18367
DOI:	10.1002/chem.201604766
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access (Creative Commons)
Date of first compliant deposit:	22 December 2016
Date of first compliant Open Access:	22 December 2016
Funder:	Engineering and Physical Sciences Research Council (EPSRC), Science and Technology Facilities Council (Great Britain) (STFC), Birmingham Science City, Advantage West Midlands (AWM), European Regional Development Fund (ERDF)
Grant number:	EP/J500586 (EPSRC), CMPC1 1104 (STFC)

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